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绕飞轨道控制是追踪器与非合作目标进行自主交会对接的关键技术。本文针对同轨道平面的绕飞问题,根据双冲量轨道逼近动力学特性,将绕飞轨道分解为两个逼近轨道,采用有摄动情况下双冲量轨道逼近改进算法实现绕飞轨道控制。绕飞控制时,在轨道误差范围内,数次冲量累计同时施加,减少由于单次冲量小而造成的较大相对误差。最后进行了数学仿真,仿真结果表明该算法能实现绕飞轨道控制,具有设计简单、燃料消耗少的特点。 相似文献
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根据理论分析和多年来的实装训练、实弹发射经验,总结分析了造成导弹模飞检查失败的七种可能原因,其结论既可以指导同型导弹部队在训练、作战中快速排除故障,也可为导弹研制单位有关人员提供技术参考。 相似文献
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根据火箭控制系统闭环模飞的方案, 讨论了平台系统中惯性器件激励电流的计算方法, 其中考虑了地球自转对陀螺的影响。根据工程需要对公式进行了简化 相似文献
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海射公司的天顶3SL火箭2月1日在太平洋赤道海域的发射平台上发射了国际通信卫星公司的"国际通信卫星"27,但火箭升空后不久便出现故障,导致星箭坠入距发射平台不远的海中.据报道,火箭几乎刚一起飞就出现了问题,第一级发动机于起飞后约25秒紧急关机.海射公司在发射后约1小时发表声明,称火箭升空大约40秒后便失去了全部遥测信号,表明发射任务失败.俄罗斯媒体报道说,发射在火箭偏离预定飞行路线后被中止.本次失败将给因2007年的上次失败而一度陷入困境的海射公司造成又一次沉重打击. 相似文献
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阐明了模型自由飞试验可靠性问题研究的重要性,指出自由飞试验的可靠性从本质上讲取决于总体方案的制定和各分系统的设计阶段;明确提出自由飞试验的可靠性设计任务;较为详细地论述了模型自由飞试验研究工程的可靠性设计内容,其中包括:可靠性指标的确定,可靠性模型的建立,可靠性预测,可靠性分配,可靠性设计技术,可靠性试验,可靠性评估等。 相似文献
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星载激光雷达是高精度测量全球温室气体和气溶胶垂直廓线的重要手段,大气环境监测卫星大气探测激光雷达(ACDL)在国际首次采用激光积分路径差分吸收技术测量全球CO2柱浓度,采用532 nm高光谱探测技术测量气溶胶和云的廓线。星载激光雷达载荷研制期间,同步研制一套主要功能一致的机载大气探测激光雷达校飞样机,并开展机载飞行试验,获取了大量飞行试验及其对比数据,提供了机载平台真实的数据源,对于优化ACDL激光雷达系统参数和研究星载数据反演算法至关重要。最后在机载飞行平台下,验证了优于1 ppm的CO2柱浓度测量精度和优于15%的气溶胶测量精度。未来利用该机载样机可以进一步开展星地对比验证。 相似文献
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Within the European space platform program the EURECA is being established as a ground-based platform for short microgravity missions. The development towards a serviceable platform for longer, scientific missions is described. The plan of an advanced space-based platform for increasing payload demands is outlined. The platform design and the adaptation to scientific missions and servicing operations are investigated. The cost-effective utilization of the different platform types using new operational concepts is analyzed in parametric life cycle cost calculations for different payloads and mission scenarios. 相似文献
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高精度惯性平台连续自标定自对准技术 总被引:8,自引:2,他引:8
提出了一种新的惯导误差系数标定方法——连续自标定自对准方法。利用外部参考力矩驱动平台按照一定角速度旋转,在平台加矩角速度、地球自转角速度和重力加速度的影响下,惯导平台的加速度表输出包含陀螺误差系数、加速度表误差系数、平台对准误差以及陀螺和加速度表的安装误差等全部误差信息,并由此得到平台失准角动态方程与加速度表的输出方程。在设计的平台连续旋转轨迹下,使用迭代Kalman滤波获得了全部平台误差系数的精确估计。与传统的多位置翻滚标定方法相比,该方法标定时间短,标定精度高,系统误差参数估值具有良好的收敛性。 相似文献
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研究了双体卫星(DFP)对日定向姿态机动控制问题。首先分析双体卫星工作机理,建立载荷舱与平台舱姿态模型,推导磁浮机构线圈和磁钢相对距离的数学表达式。提出基于PD控制的载荷舱对日姿态机动、平台舱姿态跟踪以及两舱避碰等控制策略。在此基础上,为提高平台舱姿态跟踪速度,设计反步控制器对平台舱飞轮的动态特性进行补偿。进一步,为提高两舱协同控制性能,对传统PD控制进行改进,提出基于变增益PD控制的载荷舱姿态机动控制律,将两舱相对姿态信息包含在载荷舱对日姿态机动控制律中,有效降低了两舱碰撞风险,提高了两舱姿态机动速度。仿真结果表明,本文控制算法能有效实现双体卫星对日定向,且能避免两舱碰撞。 相似文献
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The stratospheric airship provides a unique and promising platform for broad band telecommunication relay missions, which combine the advantages of both terrestrial and satellite communication. In this paper, the conceptual design, dynamics modeling and attitude control of the stratospheric telecommunication platform are presented. First, the stratospheric telecommunication platform is introduced, including conceptual design, configuration, energy sources, propeller and payload. Second, dynamics model of the platform is derived form the Newton–Euler formulation and the station-keeping attitude control problem is formulated. Then, the adaptive fuzzy sliding mode control scheme is proposed to develop the attitude-tracking control system, with a particular focus on parametric uncertainties and external disturbances. Finally, simulation results verify the effectiveness and robustness of the proposed control scheme. The proposed conceptual design and control scheme provide a promising approach for telecommunication relay missions using the stratospheric station-keeping airship. 相似文献
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Using a novel space platform-based manipulator with slewing and deployable links, the paper addresses two issues of considerable importance: (a) How important is it to model flexibility of the system? (b) How many modes are needed to adequately represent the elastic character? Results suggest that the fundamental mode is able to capture physics of the response quite accurately. Due to its massive character, the platform dynamics is virtually unaffected, even by severe maneuvers of the manipulator. Hence, treating the platform as rigid would save the computational cost without affecting the accuracy. Although the link flexibility does affect the manipulator's tip vibration, the joint and platform vibrations remain negligible. The revolute joint flexibility appears to be an important parameter affecting both the joint as well as tip responses. The information should prove useful in the design of this new class of manipulators. 相似文献
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V. A. Pogorelov 《Cosmic Research》2009,47(1):44-52
The problem of attitude control of a gyro-stabilized platform with the structurally uncertain drift model is solved. The solution is realized in two stages. At the first stage, on the basis of the obtained stochastic model of the reusable spacecraft navigation system, the drift model of gyro-stabilized platform is identified. At the second stage, the control of its spatial orientation is synthesized with regard to the found drift model. The results of numerical simulation are presented in conclusion. 相似文献